头像大小导致 nav颜色中间差

templates/nav_li_profile.html

 {% load mytags %}
 <li class="nav-header">
     <div class="dropdown profile-element"> <span>
-{#        <img alt="image" class="img-circle" width="64" height="64" src="/static/img/{{ role_id | to_avatar }}.png" />#}
-        <img alt="image" class="img-circle" src="/static/img/profile_small.jpg">
+        <img alt="image" class="img-circle" width="48" height="48" src="/static/img/{{ role_id | to_avatar }}.png" />
+{#        <img alt="image" class="img-circle" src="/static/img/profile_small.jpg">#}
          </span>
         <a data-toggle="dropdown" class="dropdown-toggle" href="#">
         <span class="clear"> <span class="block m-t-xs"> <strong class="font-bold">{{ user_id | to_name}}</strong>